In the paper, authors present a greedy algorithm for construction of exact and partial tests (super-reducts) for decision tables with many-valued decisions. Exact tests can be over-fitted, so instead of them it is often more appropriate to work with partial tests with smaller number of attributes. Based on results for set cover problem authors study bounds on accuracy of greedy algorithm for ex...

The aim of this study is to develop a novel decision support system, which has never been developed yet, in order optimize machining parameters. We combine the three distinct methods: experimental design and analysis, fuzzy data envelopment analysis (DEA) analytical hierarchy process (AHP). Firstly, full factorial experiment including four factors levels carried out. take into account cutting s...

Conventional data envelopment analysis (DEA) methods assume that input and output variables are continuous. However, in many real managerial cases, some inputs and/or outputs can only take integer values. Simply rounding the performance targets to the nearest integers can lead to misleading solutions and efficiency evaluation. Addressing this kind of integer-valued data, the current paper propo...

We present a new architecture of layered space-time codes as a combination of BLAST architecture and of special STTC codes which are variations about the codes first introduced by Jafarkhani et al. and named Super Orthogonal Space-Time Trellis Codes (SOSTTC). Using powerful set partitioning, these codes are able to combine the coding advantage of STTC’s together with the advantage diversity of ...

Abstract In a decision-making process, one finds that there are alternatives which can be categorized into several groups, based on his or her perspectives, and/or on expected outcome, such as whether his or her choice brings about gains or losses, or that such a choice is right or wrong. Besides, there are many cases with a dilemma where it is hard to select the best choice through transitive ...

AIM The growing enthusiasm to perform laparoscopic sleeve gastrectomy (LSG) in morbidly obese patients exposes also the complications associated with this type of surgery. LSG is not only performed in super-super-obese patients, but in addition has also its standing as a procedure in patients with multiple intraabdominal adhesions based on prior surgeries or after failed gastric banding. Howeve...

For the past twenty years, protein tertiary structure research has been given much attention, with solutions existing for both wet lab procedures (x-ray crystallography and NMR spectroscopy) and bioinformatics approaches (threading, homology-modeling, and de novo). Unfortunately, each approach has significant shortcomings, such as necessary time, capital, expertise (for wet lab procedures) or r...

We propose an efficient search scheme based on a self-organizing hierarchical ring structure in unstructured peer-to-peer systems. Our solution maintains a consistent super-peer ratio and makes the peers with relatively high capacities super-peers in dynamic environments. The benchmarking results show that the proposed algorithm outperforms the static algorithm that has the fixed number of rend...

Web-based course is the important method in the landscape design teaching. In this paper, the ANP (Analytic Network Process) model has been adopted to evaluate the quality of the development of on-line courses, so as to provide the basis for preferred online courses. Conclude 10 evaluation indicators from 3 aspects of teaching, availability, and technology, and establish ANP model consisting of...